Ferberite with Marcasite and Arsenopyrite Chalcanthite but it’s definitely different than

but it’s definitely different than typical pieces from Viloco

I like to call them “black beauties”) is the fact that they’re not always terribly aesthetic

lustrous rich blue-green colored crystals of Amazonite with minor attached Albite (var:: Cleavelandite)

This piece was collected in the late 1970s – early 1980s and remained in a private collection for decades

Only a very small percentage of the Augelites from Machacamarca are found in twinned crystals

Ferberite with Marcasite and Arsenopyrite Chalcanthite but it’s definitely different thanA wonderfully well crystallized, and eye catching closed twin of Ferberite with great form, sharpness and luster is coated by spherical aggregates of pale golden Marcasite and minor grey Arsenopyrite. The piece is virtually undamaged on the display side and when propped up, the piece displays beautifully. Good Bolivian Ferberites are not often found with any associated minerals, especially with any kind of aesthetic appeal like this one. Its a great